Many chain devices promise much but sadly they often don’t go the distance. When things turn bad and get out of shape, the well-loved benchmark G3 guide has kept us rolling, never letting us down. MRP have designed the lower guide as either a roller or a slider, the former working well in the dust and the latter when conditions yet mucky.

‘The G4 guide has unbeatable performance and is still the choice of many top riders’

Launched about two years ago, the latest take on the original, is the G4. Here MRP has redesigned the upper retention system. This co-moulded ‘HD’ guide is nylon but now has a softer durometer TPU material on the interior walls and ceiling reducing noise levels from the chain; an improvement on the older G3 model. The lower skid plate has had attention too, now being made from an improved material. The G3 weighs in at between 153–204g, depending on whether you go for the carbon or aluminium back plate.